Electrified construction and/or material handling machine, in particular crane

Abstract

The present invention comprises an electrified construction and/or material handling machine, in particular a crane, with electric drives for driving working assemblies, an electric energy store for supplying the electric drives with power, and a charging device for recharging the energy store, wherein the charging device has various charging interfaces for charging the energy store from various power supplies comprising at least one machine-integrated power generator and an external power supply.

We claim: 
     
         1 . An electrified construction and/or material handling machine comprising:
 a crane;   electric drives for driving working assemblies;   an electric energy store for supplying the electric drives with power; and   a charging device for recharging the energy store;   wherein the charging device comprises various charging interfaces for charging the energy store from various power supplies comprising at least one machine-integrated power generator and an external power supply.   
     
     
         2 . The electrified construction and/or material handling machine of  claim 1 , wherein the machine-integrated power generator comprises an internal combustion engine, and the machine further comprises a charge control device for controlling the internal combustion engine in dependence on a state of charge and/or a charge demand of the energy store. 
     
     
         3 . The electrified construction and/or material handling machine of  claim 2 , wherein the charge control device is configured to operate the internal combustion engine at charging intervals in a rated power range and/or a power range in which a power/fuel consumption ratio is maximized. 
     
     
         4 . The electrified construction and/or material handling machine of  claim 3 , wherein the charge control device is configured to operate the machine-integrated power generator only in an interval-like manner, wherein the charging intervals in which the machine-integrated power generator is in operation in relation to a machine operating time of the construction and/or material handling machine are shorter than non-charging intervals in which the machine-integrated power generator is switched off. 
     
     
         5 . The electrified construction and/or material handling machine of  claim 4 , wherein the charging intervals, as a whole, are less than 50% of the machine operating time and/or, individually, are less than 30% of the machine operating time. 
     
     
         6 . An electrified construction and/or material handling machine of  claim 2 , wherein the charge control device is configured to operate the recharging of the energy store on a priority basis via a one of the charging interfaces, connectable to the external power supply, and to operate the recharging via the one of the recharging interfaces, connectable to which the machine-integrated power generator only on a secondarily basis if no power or insufficient power can be drawn via the one of the charging interfaces for the external power supply. 
     
     
         7 . The electrified construction and/or material handling machine of  claim 2 , wherein the charge control device is configured to automatically start recharging as required and during machine operation. 
     
     
         8 . The electrified construction and/or material handling machine of  claim 2 , wherein the charge control device is configured to communicate with a construction site management computer and/or a BIM server and to process charge demand data provided by a planning module, wherein the charge demand data characterizes the charge demand for future jobs of the construction and/or material handling machine, and to control the recharging of the energy store in dependence on said charge demand data. 
     
     
         9 . The electrified construction and/or material handling machine of  claim 2 , wherein one of the charging interfaces for recharging from the external power supply is configured to allow recharging from a power from the power supply, the power of which is below the power demand of the working assemblies of the construction and/or material handling machine and/or provides current and/or voltage magnitudes which are below the current and/or voltage magnitudes required by the working assemblies. 
     
     
         10 . The electrified construction and/or material handling machine according to  claim 9 , wherein the one of the charging interfaces for recharging from the external power supply is configured to perform recharging operations at 230 volts and 16 amperes or 400 volts and 16 amperes. 
     
     
         11 . The electrified construction and/or material handling machine according to  claim 9 , wherein at least one further charging interface is configured to charge the energy store from a solar panel and/or from a fuel cell. 
     
     
         12 . The electrified construction and/or material handling machine of  claim 11 , wherein the charging device comprises a further charging interface for recharging from a direct current source. 
     
     
         13 . The electrified construction and/or material handling machine of  claim 1 , wherein the energy store is permanently installed. 
     
     
         14 . The electrified construction and/or material handling machine of  claim 1 , further comprising a storage interface for connecting the one or a further energy store in a detachable, interchangeable manner. 
     
     
         15 . The electrified construction and/or material handling machine of  claim 14 , wherein the storage interface comprises a sensor interface for connecting a state of charge sensor system for detecting the state of charge of the energy store connected thereto and/or a communication interface for communicating to the charging device the state of charge and/or energy store data characterizing the energy store and/or the operating state thereof. 
     
     
         16 . The electrified construction and/or material handling machine of  claim 1 , wherein the energy store is integrated directly into the power supply of the electric drives of the working assemblies and/or is incorporated into a power supply device of the electric drives in such a manner that the DC voltage provided by the energy store is made available to the electric drives or their power electronics without prior conversion via inverters and/or rectifiers. 
     
     
         17 . The electrified construction and/or material handling machine of  claim 1 , wherein the one or a further of the at least one machine-integrated power generator for recuperative power harvesting is connected or connectable to a movable machine element and/or a drive train of the construction and/or material handling machine, and wherein the charging device is configured to recharge the energy store with the recuperatively harvested power, optionally for temporarily storing in an intermediate store. 
     
     
         18 . The electrified construction and/or material handling machine of  claim 1 , wherein the electric drives comprise a first electric traction drive and a second electric traction drive, the machine further comprising an undercarriage with a traveling gear and, the first  8  electric traction drive, and a superstructure mounted on the undercarriage rotatably about an upright axis of rotation, and comprising the second electric traction drive for driving working assemblies, the machine further comprising a bidirectional connection between first electric devices of the undercarriage and second electric devices of the superstructure for transmitting power from the superstructure to the undercarriage and from the undercarriage to the superstructure. 
     
     
         19 . The electrified construction and/or material handling machine of  claim 18 , wherein the energy store is configured to provide power to the first and second traction electric drives via said bidirectional connection and/or can receive recuperatively harvested power on the undercarriage and the superstructure. 
     
     
         20 . The electrified construction and/or material handling machine of  claim 1 , wherein the crane has a jib from which a hoist cable descends, and is actuatable by a lifting mechanism, wherein the electric drives of the lifting mechanism are configured to be driven from the energy store.